Double spindle inverted CNC lathe

Abstract

The present invention provides a dual-spindle inverted CNC lathe, which solves the problems of manual reversing machining and turning of workpieces, and includes a lathe body, a loading rack is arranged on one side of the lathe body and a belt conveyor is arranged on the other side, two inverted cutting spindles are installed above the lathe body through a movable guide rail assembly, servo tool holders opposite to the cutting spindles are arranged below the cutting spindles, and a bar reversing mechanism for transferring and machining bar materials is arranged between the cutting spindles. The present invention has the advantages of high machining efficiency and good operation stability.

Description

Technical Field

[0001] The invention belongs to the technical field of CNC lathes, and in particular relates to a double-spindle inverted CNC lathe. Background Art

[0002] The difference between a vertical lathe and an ordinary lathe is that its spindle is vertical, which is equivalent to setting an ordinary lathe upright. Since its workbench is in a horizontal position, it is suitable for processing heavy parts with large diameters and short lengths. The vertical tool holder on the vertical lathe can move along the crossbeam guide and the tool holder seat guide for horizontal or longitudinal feeding. The tool holder seat can be deflected at a certain angle for oblique feeding. The side tool holder can move up and down along the column guide, or move left and right along the tool holder slide to achieve longitudinal or lateral feeding. The vertical lathe is a large-scale mechanical equipment used to process large and heavy workpieces with large radial dimensions and relatively small axial dimensions and complex shapes. Such as cylindrical surfaces, end faces, conical surfaces, cylindrical holes, conical holes, etc. of various discs, wheels and sleeves. It can also be used with the help of additional devices for threading, spherical surface, profiling, milling and grinding. Compared with the horizontal lathe, the workpiece is clamped on the clamping decoration inside the horizontal lathe. The vertical lathe has a vertical spindle axis and a horizontal worktable surface, so it is easy to clamp and align the workpiece. This layout reduces the load on the spindle and bearings, so the vertical lathe can maintain working accuracy for a long time. However, in actual use, the vertical lathe with a single spindle design has low efficiency for large-scale parts processing. In addition, some shaft workpieces need to be processed at both ends separately, and conventional vertical lathes require manual reversing, which is not conducive to mass production.

[0003] In order to solve the shortcomings of the existing technology, people have conducted long-term exploration and proposed various solutions. For example, the Chinese patent document discloses a short automated production line for a vertical and inverted combined CNC lathe [200520022008.4], which is equipped with an inverted spindle unit and a vertical rotary tool holder on the left and right sides of the upper bed, respectively, the inverted rotary tool holder and the vertical spindle unit are fixed on the middle part of the lower bed, the loading manipulator is equipped on the side of the vertical rotary tool holder, a positioning device is arranged on the side of the inverted rotary tool holder on the lower bed, and the loading device and the unloading device are respectively arranged below the outer side of the vertical rotary tool holder and the inverted spindle unit.

[0004] The above solution solves the problem of low continuous processing efficiency of parts to a certain extent, but the solution still has many shortcomings, such as the need for manual reversing and inconvenience in bidirectional processing of shaft workpieces. Summary of the invention

[0005] The purpose of the present invention is to provide a dual-spindle inverted CNC lathe with a reasonable design and capable of realizing automatic reversing and continuous processing of workpieces in view of the above problems.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: the dual-spindle inverted CNC lathe comprises a lathe body, a loading rack is arranged on one side of the lathe body and a belt conveyor is arranged on the other side, two inverted cutting spindles are installed above the lathe body through a movable guide rail assembly, servo tool holders opposite to the cutting spindles are arranged below the cutting spindles, and a bar reversing mechanism for transferring and processing bar materials is arranged between the cutting spindles. The bar reversing mechanism can realize the transfer of bar materials and the reversal of the upper and lower ends, which is convenient for the cutting spindle to turn the two ends of the bar materials respectively, and is suitable for bidirectional continuous processing of large quantities of workpieces.

[0007] In the above-mentioned dual-spindle inverted CNC lathe, the bar reversing mechanism includes two symmetrically arranged swivel arm assemblies, the swivel arm assembly has a swivel shaft arranged above the lathe body and extending longitudinally along the lathe body, the swivel shafts are parallel to each other and rotatably connected to the lathe body, a vertically arranged mounting column is installed above the lathe body, a swivel hole for the swivel shaft to pass through is opened on the mounting column, the end of the swivel shaft is connected to the output end of the swivel motor installed on the back of the lathe body, a rotating plate perpendicular to the swivel shaft is fixed to the other end of the swivel shaft, a chuck assembly is installed on the opposite side of the swivel plate, and a telescopic mechanism is arranged between the chuck assembly and the swivel plate. The mounting column is used to install the swivel arm assembly, and the swivel motor is fixed on the back of the mounting column to prevent foreign matter from invading the motor. The chuck assembly is relatively independent and is used to clamp disc-shaped or short bar stock. The telescopic mechanism can drive the chuck assembly to complete the transfer of the workpiece, so that the workpiece transfer process is carried out smoothly.

[0008] In the above-mentioned dual-spindle inverted CNC lathe, a vertically arranged mounting column is installed above the lathe body, and a rotating hole for the rotating shaft to pass through is opened on the mounting column. The chuck assembly includes a cylindrical chuck seat body, and a plurality of hydraulically driven claws are arranged at the end of the chuck seat body, which are symmetrical relative to its center. The telescopic mechanism includes a telescopic cylinder fixed to one side of a rotating plate, and a telescopic table connected to the chuck assembly is fixed at the end of the telescopic rod of the telescopic cylinder. A telescopic limiting mechanism is arranged between the telescopic table and the telescopic cylinder, and the telescopic limiting mechanism includes a limiting column parallel to the telescopic rod, and a limiting protrusion symmetrical relative to its center is arranged on the side of the telescopic table. The limiting column and the limiting protrusion are fixed. A fixed connection is provided, a limit hole for inserting a limit column is provided at the end opposite to the telescopic cylinder and the telescopic table, the limit column is axially extended and retracted relative to the limit hole, the chuck assemblies between the rotating arm assemblies are relatively arranged and the central axes are coincident, two vertical spindles are installed above the lathe body, the rotating arm assembly is arranged between the vertical spindles, a through hole for installing the telescopic mechanism and the chuck assembly is provided on the rotating plate, the central axes of the through holes on the rotating plate arranged vertically symmetrically are coincident, the chuck assemblies between the rotating arm assemblies are relatively arranged and the central axes are coincident, and a spacing for clamping the bar is reserved between the chuck assemblies of the rotating arm assemblies when they are relative, and the rotary motor, the chuck assembly and the telescopic mechanism are connected to the CNC module. The telescopic limit mechanism improves the stability of workpiece transfer and ensures that the workpiece clamped by the chuck assembly moves axially. The centers of the chuck assemblies are relative. When the swivel arm assembly rotates to a relative position, the bayonet holes of the chuck assembly cooperate with each other. The vertical spindle is used for processing at both ends of the workpiece, thereby improving the workpiece processing efficiency. The through hole is used to install the telescopic mechanism and the chuck assembly, and at the same time facilitates the center positioning and fixing. A certain distance is maintained between the swivel arm assemblies, and the clamped bar material will not collide with another swivel arm assembly when the swivel arm assembly is flipped.

[0009] In the above-mentioned dual-spindle inverted CNC lathe, the moving guide rail assembly includes a sliding seat body installed on the lathe body, a lateral movement mechanism for driving the sliding seat body to move horizontally relative to the lathe body is arranged between the sliding seat body and the lathe body, and a sliding table body that can be lifted up and down relative to the sliding seat body is installed on the sliding seat body through a vertical movement mechanism. The moving guide rail assembly drives the cutting spindle to quickly align the tool to realize CNC machining.

[0010] In the above-mentioned dual-spindle inverted CNC lathe, the lateral movement mechanism includes two parallel lateral slide rails extending along the lateral direction of the lathe body, a plurality of lateral sliders engaged with the lateral slide rails are fixed on the side of the sliding seat body opposite to the lateral slide rails, lateral limit grooves are respectively provided on the upper and lower parts of the lateral slide rails, and lateral limit protrusions engaged with the lateral limit grooves are provided on the lateral sliders. A pad is arranged between the lateral sliders and the sliding seat body, a lateral driving mechanism is installed at one end of the lathe body, and the lateral driving mechanism adopts gear rack transmission, screw transmission or hydraulic / pneumatic transmission, and the vertical movement mechanism includes two parallel vertical slide rails extending along the vertical direction of the sliding table body, and the slide A plurality of vertical sliders engaged with the vertical slide rail are fixed on the side of the moving seat body opposite to the vertical slide rail, vertical limit grooves are respectively provided on both sides of the vertical slide rail, and vertical limit protrusions engaged with the vertical limit grooves are provided on the vertical slider, and a plurality of slide rail pressing blocks are arranged between the vertical slide rail and the sliding platform body, a flange bracket is installed above the sliding seat body, and a vertical driving mechanism is installed between the flange bracket and the sliding platform body, and the vertical driving mechanism includes a servo motor installed above the flange bracket, the output end of the servo motor faces downward and is connected to a driving screw through a coupling, a screw seat body is installed on the sliding platform body, a screw nut is installed at the center of the screw seat body, and the screw nut is connected to the driving screw. The lateral moving mechanism drives the sliding seat to move lateraly, and multiple parallel lateral slide rails improve the operating stability of the lateral moving mechanism. A suitable lateral driving mechanism is selected according to actual needs. The vertical moving mechanism adopts a combination of a vertical slide rail and a vertical slider. The flange bracket above the sliding table is installed with a vertical driving mechanism to provide driving force. The vertical driving mechanism adopts a screw drive method, thereby realizing stepless lifting and lowering of the sliding table, thereby improving the accuracy of workpiece tool setting.

[0011] In the above-mentioned dual-spindle inverted CNC lathe, a side cover plate is installed at the lower end of the sliding table body, and the side cover plate is arranged between the electric spindle assembly and the hydraulic chuck. A positive baffle is fixed on the side opposite to the sliding table body below the side cover plate, and an upper baffle is fixed on the other side. A chip guard cover opposite to the side of the hydraulic chuck is fixed below the side cover plate, and a top cover plate for enclosing the side of the cutting spindle is fixed above the side cover plate. An oil pipe bracket is fixed on the sliding table body, and a plurality of guide holes for oil supply pipes are opened on the oil pipe bracket. Grease distributors are respectively installed on both sides of the sliding seat body. The cutting spindle includes a spindle box installed on the sliding table body, and an electric spindle body is installed in the vertical direction at the center of the spindle box. A rotary hydraulic cylinder is fixed above the electric spindle body, and the rotary hydraulic cylinder is connected to the hydraulic chuck installed at the lower end of the electric spindle body through a pull rod. Cooling sleeve, the outside of the cooling sleeve is provided with a cooling groove arranged in an annular coil, a clamping ring is sleeved between the outer side of the upper side of the cooling sleeve and the outer side of the spindle cover above the spindle box, the clamping ring is provided with a notch and an adjusting bolt for adjusting the looseness of the clamping ring is provided in between, a sealing groove opposite to the inner side of the spindle box is provided on the outside of the cooling sleeve, a sealing ring fitted and pressed against the spindle box is provided in the sealing groove, a pulling hole for the pull rod to pass through is provided in the center of the electric spindle body, a sealing cylinder pressed and fixed to the lower end of the cooling sleeve and a spacer ring sleeved on the outside of the sealing cylinder are provided on the outside of the lower end of the electric spindle body, the hydraulic chuck comprises a chuck body and a jaw block symmetrically arranged relative to the center of the chuck body, the chuck body is connected to the jaw block through a jaw foot and a gap is left between the chuck body and the jaw block, and the jaw foot and the jaw block are opposite to each other with fixing grooves and fixing strips inserted and cross-arranged. Each cover plate isolates the chuck from the electric spindle assembly to prevent chips and cutting fluid splashing from affecting the normal operation of the slide rail and the screw. The oil pipe bracket and the grease distributor guide the lubricating oil to lubricate the screw guide rail to ensure its operating stability. The cooling groove on the outside of the cooling jacket takes away the heat in the electric spindle assembly when the refrigerant fluid flows through. The cooling groove is coiled to generate positive pressure to isolate the external fluid during rotation. The clamping ring improves the sealing of the connection between the cooling jacket and the spindle cover under the action of the clamping force. The pull rod is pulled up and down in the pull hole, and the lower end of the pull rod passes through the sealing cylinder and the spacer ring to connect with the hydraulic chuck. The fixing groove and the fixing bar are cross-arranged to improve the installation stability of the clamping jaw block and prevent it from loosening during the clamping process.

[0012] In the above-mentioned dual-spindle inverted CNC lathe, a chip removal device is arranged below the lathe body, and the chip removal device includes a lower shell body arranged below the lathe body, the lower shell body is in a long strip shape and has a chip collection chamber inside, a chip feed port is opened above the lower shell body, one end of the lower shell body is connected to an inclined shell body arranged obliquely, an upper shell body is connected above the inclined shell body, the interior of the upper shell body is a chip removal chamber, and a chip removal port connected to the chip removal chamber is opened below the upper shell body, the interior of the inclined shell body is a chip removal channel connecting the chip collection chamber and the chip removal chamber, a driving mechanism is installed above the upper shell body, the driving mechanism is connected to the conveyor belt assembly, and the conveyor belt assembly is arranged in the chip removal chamber, the chip removal channel and the chip collection chamber The lower shell extends from the lower front part to the rear part of the lathe body, and the inclined shell and the upper shell are arranged on the back of the lathe body. A negative pressure chamber is arranged inside the lower shell, and negative pressure ports connected with the negative pressure chamber are opened on both sides of the chip collecting chamber. A centrifugal pump is installed above the end of the lower shell opposite to the inclined shell, and the centrifugal pump is connected to the negative pressure chamber. A socket opposite to the negative pressure chamber is arranged above the junction of the lower shell and the inclined shell, and a filter baffle is inserted in the socket. An inclined chip guide plate is arranged at the chip inlet above the chip collecting chamber, and the negative pressure ports are arranged in a strip shape below the chip guide plate. The main shell of the chip removal device is arranged below and on the back of the lathe body, so as not to affect the normal processing operation in front of it. The centrifugal pump generates negative pressure suction in the lower shell to prevent small chips from falling into the chip collection chamber and causing splashing. The filter baffle prevents the chips from being sucked into the centrifugal pump and causing damage to the centrifugal pump. The chip guide plate guides the chips into the chip collection chamber, and the negative pressure port is arranged below the chip guide plate to prevent the chips from being directly sucked into the negative pressure chamber.

[0013] In the above-mentioned dual-spindle inverted CNC lathe, a plurality of support bars are arranged below the chip collection chamber, the support bars are C-shaped and the two ends are respectively fixed to the side surfaces of the lower shell body, adjustment holes extending in the transverse direction are respectively opened on both sides of the upper shell body, the outer sides of the adjustment holes are covered with an adjustment shell body, adjustment bars extending in the transverse direction and respectively arranged above and below the adjustment holes are arranged in the adjustment shell body, adjustment seats that can slide relative to the adjustment bars are clamped between the adjustment bars, adjustment grooves that cooperate with the adjustment bars are opened above and below the adjustment seats, a pulley mounting hole opposite to the adjustment hole and opposite to the conveyor belt assembly is opened on the adjustment seat, and a threaded connection with the adjustment shell body is installed on one side of the adjustment seat. Adjusting bolts, the driving mechanism includes a mounting platform fixed above the upper shell body, a plurality of studs for adjusting the relative height of the mounting platform and the upper shell body are arranged between the mounting platform and the upper shell body, a driving motor is fixed above the mounting platform, and the output end of the driving motor drives the conveyor belt assembly to move through a sprocket transmission mechanism, a sprocket cover plate is arranged on the outer side of the sprocket transmission mechanism, a plurality of support seats are arranged below the outer side of the lower shell body, and a support foot and / or a universal wheel are installed under the support seat, and the conveyor belt assembly includes a conveyor belt wheel rotatably installed in the chip removal chamber and the chip collection chamber, a conveyor belt is arranged between the conveyor belt wheels, and the conveyor belt is fittedly arranged at the bottom of the chip collection chamber and the chip removal channel. The support bar improves the structural strength of the chip collection chamber and is used to carry the conveyor belt assembly. The position of the adjustment seat can be adjusted to keep the structure of the conveyor belt assembly stable. The mounting table can be adjusted up and down to cooperate with the adjustment seat to adapt to different driving mechanisms. The sprocket transmission mechanism drives the conveyor belt assembly to operate and realize continuous removal of chips. The conveyor belt wheel drives the conveyor belt to operate, which can lift the chips in the chip collection chamber and input them into the chip storage device for centralized processing. A certain gap is left between the conveyor belt and the shell for the transfer of chips.

[0014] In the above-mentioned dual-spindle inverted CNC lathe, the servo tool holder includes a tool holder column arranged on the lathe body, a rotary turret is fixed on the side of the tool holder column opposite to the spindle, the tool holder motor of the rotary turret is plugged and fixed in the tool holder column, the rotary turret adopts a rear turret, a tool holder seat body is arranged between the rear turret and the tool holder motor, a locking mechanism is arranged between the tool holder seat body and the rear turret, the center plane of the rear turret is perpendicular to the horizontal plane, a fixing mechanism is arranged between the tool holder seat body and the top of the lathe body, a CNC module connected to the tool holder motor and the locking mechanism is arranged in the rotary turret, the rear turret has a plurality of tool clamping stations symmetrical with respect to its center, a first hydraulic clamping mechanism, a second hydraulic clamping mechanism or a third hydraulic clamping mechanism is fixed on the tool clamping station, and a hydraulic drive module connected to the CNC module is arranged in the rotary turret. The tool holder motor is arranged in the tool holder column, and the rear turret is arranged vertically to prevent chips or cutting fluid from falling into the turret or the motor during the cutting process, thereby providing better protection for the tool holder.

[0015] In the above-mentioned dual-spindle inverted CNC lathe, the first hydraulic clamping mechanism includes a first clamping groove arranged on the end face of the rear turret and extending in the radial direction, a first clamping block connected to the hydraulic drive module is arranged inside the first clamping groove, the second hydraulic clamping mechanism includes a hydraulic seat fixed on the side of the rear turret, a second clamping groove extending along the axial direction of the rear turret is opened on the outer side of the hydraulic seat, a second clamping block connected to the hydraulic drive module is arranged inside the second clamping groove, and the third hydraulic clamping mechanism includes a hydraulic seat fixed on the side of the rear turret. The press table, the center of the hydraulic table is provided with a clamping hole extending along the axial direction of the rear turret, one side of the hydraulic table is threadedly connected with a clamping bolt whose end is opposite to the inner side of the clamping hole, the locking mechanism is a triple gear plate arranged between the tool holder seat and the rear turret, the triple gear plate is connected to the hydraulic drive module, the hydraulic drive module is a hydraulic drive cylinder and a hydraulic distribution oil circuit connected to the hydraulic drive cylinder, the fixing mechanism includes fixing bars arranged on both sides below the tool holder seat, and a number of fixing notches are opened on the fixing bars, the rear turret is opposite to the chip removal port below the lathe body. The rear turret is provided with multiple tool clamping stations and clamping mechanisms, and a variety of tools can be installed to meet the cutting requirements of different workpieces.

[0016] Compared with the existing technology, the advantages of the present invention are: the workpiece can be automatically transferred and reversed, which makes it convenient for the lathe body to process and turn the two ends of the workpiece separately; the chips are collected and processed centrally, which is not easy to splash, and has a good protective effect on the lathe body; the double inverted spindles can realize continuous processing of the workpiece and improve the efficiency of parts processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the assembly of the movable guide rail assembly of the present invention;

[0019] Figure 3 It is a schematic structural diagram of the cutting spindle of the present invention;

[0020] Figure 4 is a schematic structural diagram of the cutting spindle of the present invention from another perspective;

[0021] Figure 5 is a schematic structural diagram of the cutting spindle of the present invention from another perspective;

[0022] Figure 6 is a structural sectional view of the cutting spindle of the present invention;

[0023] Figure 7 It is a schematic diagram of the assembly of the servo tool holder of the present invention;

[0024] Figure 8 is a schematic structural diagram of the servo tool holder of the present invention;

[0025] Fig. 9 is a structural schematic diagram of the servo tool holder of the present invention from another perspective;

[0026] Fig.10 It is a schematic diagram of the assembly of the bar reversing mechanism of the present invention;

[0027] Fig.11 is an enlarged schematic diagram of the bar reversing mechanism of the present invention;

[0028] Fig.12 It is a structural schematic diagram of the bar reversing mechanism of the present invention;

[0029] Fig.13 It is a schematic diagram of the assembly of the chip removal device of the present invention;

[0030] Fig.14 It is a schematic structural diagram of a chip removal device of the present invention;

[0031] Fig.15 is a structural sectional view of a chip removal device of the present invention;

[0032] Fig.16 is a partial schematic diagram of a chip removal device of the present invention;

[0033] In the figure, a lathe body 1, a loading rack 2, a movable guide rail assembly 3, a sliding seat body 32, a lateral moving mechanism 33, a lateral slide rail 331, a lateral slider 332, a lateral limit groove 333, a lateral limit protrusion 334, a pad 335, a lateral driving mechanism 336, a vertical moving mechanism 34, a vertical slide rail 341, a vertical slider 342, a vertical limit groove 343, a vertical limit protrusion 344, a slide rail pressing block 345, a flange bracket 346, a sliding table body 35, a side cover plate 351, a positive baffle plate 352, an upper baffle plate 353, a chip cover 354, a top cover plate 355, an oil pipe bracket 356, a guide hole 357, a grease distributor 358, an electric spindle assembly 36, a spindle box 361, an electric spindle body 362, a cooling sleeve 363, a cooling groove 3 64. spindle cover 365. clamping ring 366. adjusting bolt 367. sealing groove 368. sealing ring 369. rotary hydraulic cylinder 37. pull rod 371. pulling hole 372. sealing cylinder 373. spacer ring 374. hydraulic chuck 38. chuck body 381. clamping jaw block 382. clamping jaw foot 383. fixing groove 384. fixing bar 385. vertical drive mechanism 39. servo motor 391. coupling 392. drive screw 393. screw seat body 394. screw nut 395. cutting spindle 4. servo tool rest 5. tool rest column 511. chip removal port 512. rotary turret 52. tool rest motor 521. rear turret 522. tool rest seat body 523. tool clamping station 524. locking mechanism 53. triple gear plate 531. fixing mechanism 54, fixing bar 541, fixing notch 542, first hydraulic clamping mechanism 55, first clamping groove 551, first clamping block 552, second hydraulic clamping mechanism 56, hydraulic seat 561, second clamping groove 562, second clamping block 563, third hydraulic clamping mechanism 57, hydraulic platform 571, clamping hole 572, clamping bolt 573, hydraulic drive module 58, bar reversing mechanism 6, mounting column 611, rotary hole 612, vertical spindle 613, rotary arm assembly 62, rotary shaft 621, rotary motor 622, rotating plate 623, chuck assembly 63, chuck seat body 631, claw 632, telescopic mechanism 64, telescopic cylinder 641, telescopic rod 642, telescopic platform 643, telescopic limit mechanism 65, limit column 6 51. Limiting protrusion 652, limiting hole 653, chip removal device 7, lower shell 72, chip collection chamber 721, chip feed port 722, chip guide plate 723, support bar 724, support seat 725, support foot 726, universal wheel 727, inclined shell 73, chip removal channel 731, upper shell 74, chip removal chamber 741, chip removal port 742, adjustment hole 743, adjustment shell 744, adjustment bar 745, adjustment seat 746, adjustment groove 747, pulley mounting hole 748, adjustment bolt 749, drive mechanism 75, mounting platform 751, drive motor 752, sprocket transmission mechanism 753, sprocket cover plate 754, conveyor belt assembly 76, conveyor belt wheel 761, conveyor belt 762, negative pressure chamber 77, negative pressure port 771, centrifugal pump 78,Socket 79, filter baffle 791, belt conveyor 8. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1-16 As shown, the dual-spindle inverted CNC lathe includes a lathe body 1, a loading rack 2 is provided on one side of the lathe body 1 and a belt conveyor 8 is provided on the other side. Two inverted cutting spindles 4 are installed above the lathe body 1 through a movable guide rail assembly 3, and servo tool holders 5 opposite to them are respectively provided below the cutting spindles 4. A bar reversing mechanism 6 for transferring and processing bar materials is provided between the cutting spindles 4. The bar blanks are transferred one by one from the loading rack 2 to one side of the lathe body 1, and one of the cutting spindles 4 moves to the top of the blank under the action of the movable guide rail assembly 3, and at the same time, the blank is clamped and transferred to the servo tool holder 5 for rotation and turning. When one end is processed, the bar reversing mechanism 6 changes the bar and is clamped and fixed by the other cutting spindle 4. When the other end of the bar is turned, the processed product is transferred to the belt conveyor 8, thereby realizing large-scale continuous bidirectional processing of bar materials.

[0036] Specifically, the bar reversing mechanism 6 includes two symmetrically arranged swivel arm assemblies 62, the swivel arm assembly 62 has a swivel shaft 621 arranged above the lathe body 1 and extending longitudinally along the lathe body 1, the swivel shafts 621 are parallel to each other and rotatably connected to the lathe body 1, a vertically arranged mounting column 611 is installed above the lathe body 1, and a swivel hole 612 is opened on the mounting column 611 for the swivel shaft 621 to pass through, the end of the swivel shaft 621 is connected to the output end of a swivel motor 622 installed on the back of the lathe body 1, and a rotating plate 623 perpendicular to the rotating shaft 621 is fixed to the other end of the swivel shaft 621, and a chuck assembly 63 is installed on the opposite side of the rotating plate 623, and a telescopic mechanism 64 is arranged between the chuck assembly 63 and the rotating plate 623. The symmetrically arranged swivel arm assemblies 62 rotate relatively, and the chuck assembly 63 and the telescopic mechanism 64 installed on the rotating plate 623 rotate accordingly, so that the vertically arranged bar material is horizontally transferred and then turned upside down and re-arranged vertically.

[0037] In depth, a vertically arranged mounting column 611 is installed above the lathe body 1, and a rotating hole 612 for the rotating shaft 621 to pass through is opened on the mounting column 611. The chuck assembly 63 includes a cylindrical chuck seat body 631, and a plurality of hydraulically driven claws 632 are arranged at the end of the chuck seat body 631. The telescopic mechanism 64 includes a telescopic cylinder 641 fixed on one side of the rotating plate 623, and a telescopic table 643 connected to the chuck assembly 63 is fixed at the end of the telescopic rod 642 of the telescopic cylinder 641. A telescopic limiting mechanism 65 is arranged between the telescopic table 643 and the telescopic cylinder 641. The telescopic limiting mechanism 65 includes a limiting column 651 parallel to the telescopic rod 642, and a limiting protrusion 652 symmetrical to the center is arranged on the side of the telescopic table 643. The limiting column 651 and the limiting protrusion 652 are Fixedly connected, a limiting hole 653 for inserting a limiting column 651 is provided at the end opposite to the telescopic cylinder 641 and the telescopic table 643, and the limiting column 651 is axially extended and retracted relative to the limiting hole 653, and the chuck assemblies 63 between the rotating arm assemblies 62 are relatively arranged and the central axes are coincident, and two vertical spindles 613 are installed above the lathe body 1, and the rotating arm assembly 62 is arranged between the vertical spindles 613, and a through hole for installing the telescopic mechanism 64 and the chuck assembly 63 is opened on the rotating plate 623, and the central axes of the through holes on the rotating plate 623 arranged vertically symmetrically are coincident, and the chuck assemblies 63 between the rotating arm assemblies 62 are relatively arranged and the central axes are coincident, and a spacing for clamping the bar is left between the chuck assemblies 63 of the rotating arm assemblies 62 when they are relative, and the rotary motor 622, the chuck assembly 63 and the telescopic mechanism 64 are connected to the CNC module. The chuck seat bodies 631 are arranged relatively to each other, with a gap between them for clamping the rod material and allowing the telescopic mechanism 64 to telescope to realize the transfer of the rod material. The telescopic mechanism 64 is equipped with a limiting column 651 and a limiting hole 653 for the limiting column 651 to slide, which limits the telescopic trajectory of the chuck seat body 631 and avoids its misalignment.

[0038] Furthermore, the movable guide rail assembly 3 includes a sliding seat body 32 mounted on the lathe body 1, a lateral movement mechanism 33 is provided between the sliding seat body 32 and the lathe body 1 to drive the sliding seat body 32 to move laterally relative to the lathe body 1, and the sliding seat body 32 is provided with a sliding platform body 35 that can be lifted up and down relative to the sliding seat body 32 through a vertical movement mechanism 34. The lateral movement mechanism 33 and the vertical movement mechanism 34 in the movable guide rail assembly 3 realize the lateral and vertical movement of the cutting spindle 4, thereby combining the cutting spindle 4 with the mechanical claw to realize the automatic clamping and turning of the bar material.

[0039] Furthermore, the transverse movement mechanism 33 includes two parallel transverse slide rails 331 extending in the transverse direction of the lathe body 1, a plurality of transverse sliders 332 engaged with the transverse slide rails 331 are fixed on the side of the sliding seat body 32 opposite to the transverse slide rails 331, transverse limit grooves 333 are respectively provided on the upper and lower sides of the transverse slide rails 331, and a transverse limit protrusion 334 engaged with the transverse limit grooves 333 is provided on the transverse slider 332. A pad 335 is arranged between the transverse slider 332 and the sliding seat body 32, and a transverse driving mechanism 336 is installed at one end of the lathe body 1. The transverse driving mechanism 336 adopts gear rack transmission, screw transmission or hydraulic / pneumatic transmission. The vertical movement mechanism 34 includes two parallel vertical slide rails 341 extending in the vertical direction of the sliding platform body 35, and the side of the sliding seat body 32 opposite to the vertical slide rails 341 A plurality of vertical sliders 342 engaged with the vertical slide rails 341 are fixed thereto, vertical limit grooves 343 are respectively provided on both sides of the vertical slide rails 341, vertical limit protrusions 344 engaged with the vertical limit grooves 343 are provided on the vertical slider 342, a plurality of slide rail pressing blocks 345 are arranged between the vertical slide rails 341 and the sliding platform body 35, a flange bracket 346 is installed above the sliding seat body 32, a vertical driving mechanism 39 is installed between the flange bracket 346 and the sliding platform body 35, the vertical driving mechanism 39 includes a servo motor 391 installed above the flange bracket 346, the output end of the servo motor 391 faces downward and is connected to a driving screw 393 through a coupling 392, a screw seat body 394 is installed on the sliding platform body 35, a screw nut 395 is installed at the center of the screw seat body 394 and the screw nut 395 is connected to the driving screw 393. The lateral moving mechanism 33 selects a suitable lateral driving mechanism 336 according to actual needs, and cooperates with the vertical driving mechanism 39 to realize the stepless feeding of the cutting spindle 4, and can operate synchronously to achieve the processing requirements of complex curved surfaces.

[0040] In addition, a side cover plate 351 is installed at the lower end of the sliding table body 35, and the side cover plate 351 is arranged between the electric spindle assembly and the hydraulic chuck 38. A positive baffle plate 352 is fixed on the side opposite to the sliding table body 35 below the side cover plate 351, and an upper baffle plate 353 is fixed on the other side. A chip guard 354 opposite to the side of the hydraulic chuck 38 is fixed below the side cover plate 351, and a top cover plate 355 for enclosing the side of the cutting spindle 4 is fixed above the side cover plate 351. An oil pipe bracket 356 is fixed on the sliding table body 35, and an opening is provided on the oil pipe bracket 356. There are several guide holes for oil supply pipes to pass through, and grease distributors 358 are installed on both sides of the sliding seat body 32. The cutting spindle 4 includes a spindle box 361 installed on the sliding table body 35. The center of the spindle box 361 is installed with an electric spindle body 362 in the vertical direction. A rotary hydraulic cylinder 37 is fixed above the electric spindle body 362. The rotary hydraulic cylinder 37 is connected to the hydraulic chuck 38 installed at the lower end of the electric spindle body 362 through a pull rod 371. The outer side of the electric spindle body 362 is covered with a cooling jacket 363, and the outer side of the cooling jacket 363 is provided with a ring-shaped coil. A cooling groove 364 is provided, a clamping ring 366 is sleeved between the outer side of the upper side of the cooling sleeve 363 and the outer side of the spindle cover 365 above the spindle box 361, a notch is provided on the clamping ring 366 and an adjusting bolt 367 for adjusting the looseness of the clamping ring 366 is provided between the outer side of the cooling sleeve 363 and the inner side of the spindle box 361, a sealing groove 368 is provided on the outer side of the cooling sleeve 363 and is opposite to the inner side of the spindle box 361, a sealing ring 369 is sleeved in the sealing groove 368 and is pressed against the spindle box 361, a pulling hole 372 is provided in the center of the electric spindle body 362 for the pull rod 371 to pass through, and the electric spindle body 36 The outer side of the lower end is provided with a sealing cylinder 373 which is pressed and fixed with the lower end of the cooling jacket 363 and a spacer ring 374 which is sleeved on the outer side of the sealing cylinder 373. The hydraulic chuck 38 includes a chuck body 381 and a clamping jaw block 382 which is symmetrically arranged relative to the center of the chuck body 381. The chuck body 381 is connected to the clamping jaw block 382 through a clamping jaw foot 383 and a gap is left between the chuck body 381 and the clamping jaw block 382. The clamping jaw foot 383 and the clamping jaw block 382 are opposite to each other. The fixing groove 384 and the fixing strip 385 which are inserted and cross-arranged are provided. The lower part of the sliding platform 35 is isolated by a cover plate to prevent chips from sliding into its rotating connection. The electric spindle body 362 is driven to rotate by electricity, and the rotary hydraulic cylinder 37 above drives the hydraulic chuck 38 to engage through the pull rod 371, and has a faster response rate. The clamping jaw block 382 keeps a distance from the chuck body 381, leaving a clamping portion of sufficient length for bar processing. The cooling groove 364 on the outside of the cooling sleeve 363 is opposite to the inside of the spindle box 361, and the cooling fluid flows between them to take away the heat generated by the electric spindle assembly 36 during operation. The clamping ring 366 above the cooling sleeve 363 is clamped at the junction with the spindle cover 365, and the sealing ring 369 is arranged on the inside of the spindle box 361, which has a good sealing effect on the upper and lower sides of the cooling groove 364.

[0041] At the same time, a chip removal device 7 is arranged below the lathe body, and the chip removal device 7 includes a lower shell 72 arranged below the lathe body 1, the lower shell 72 is in the shape of a long strip and has a chip collection chamber 721 inside, a chip feed port 722 is opened above the lower shell 72, one end of the lower shell 72 is connected to an inclined shell 73 arranged obliquely, an upper shell 74 is connected above the inclined shell 73, the upper shell 74 has a chip removal chamber 741 inside, and a chip removal port 742 communicating with the chip removal chamber 741 is opened below the upper shell 74, the inclined shell 73 has a chip removal channel 731 connecting the chip collection chamber 721 and the chip removal chamber 741, a driving mechanism 75 is installed above the upper shell 74, the driving mechanism 75 is connected to the conveyor belt assembly 76, and the conveyor belt assembly 76 is arranged between the chip removal chamber 741, the chip removal channel 731 and the chip collection chamber 721, and the lower shell The chip inlet 722 of the body 72 is opposite to the chip collection port at the lower front of the lathe body 1. The lower shell 72 extends from the lower front of the lathe body 1 to the rear of the lathe body 1, and the oblique shell 73 and the upper shell 74 are arranged on the back of the lathe body 1. A negative pressure chamber 77 is arranged inside the lower shell 72. Negative pressure ports 771 communicating with the negative pressure chamber 77 are opened on both sides of the chip collection chamber 721. A centrifugal pump 78 is installed above the end of the lower shell 72 opposite to the oblique shell 73, and the centrifugal pump 78 is connected to the negative pressure chamber 77. A socket 79 opposite to the negative pressure chamber 77 is arranged above the junction of the lower shell 72 and the oblique shell 73, and a filter baffle 791 is inserted in the socket 79. An inclined chip guide plate 723 is arranged at the chip inlet 722 above the chip collection chamber 721, and the negative pressure ports 771 are arranged in strips below the chip guide plate 723. The chip removal device 7 is arranged as a whole below and on the back of the lathe body 1, and does not affect the front feed processing of the lathe body 1. When the lathe body 1 is turning, the chips fall into the chip collecting chamber 721 in the lower shell 72 below it. The chips with smaller mass are sucked into the chip collecting chamber 721 due to the negative pressure suction generated by the centrifugal pump 78 of the negative pressure chamber 77 during the splashing process. The driving mechanism 75 drives the lower conveyor belt assembly 76 to lift the chips upward along the chip removal channel 731 to the chip removal chamber 741 and then discharge them for centralized collection and treatment. A filter is provided at the negative pressure port 771 to filter the chips sucked into the chip collection chamber 721. The filter baffle 791 is provided in the negative pressure chamber 77 and isolates the centrifugal pump 78. The chip guide plate 723 forms a funnel-shaped material dropping structure to guide the chips. The support bar 724 extends longitudinally along the lower shell 72 and is provided between the chip collection chamber 721 and the negative pressure chamber 77, thereby improving the structural strength of the inner wall of the negative pressure chamber 77 and avoiding deformation.

[0042] It can be seen that a plurality of support bars 724 are arranged below the chip collection chamber 721, the support bars 724 are C-shaped and the two ends are respectively fixed to the side surfaces of the lower shell body 72, and adjustment holes 743 extending in the transverse direction are respectively opened on both sides of the upper shell body 74, and the outer sides of the adjustment holes 743 are covered with adjustment shell bodies 744, and adjustment bars 745 extending in the transverse direction and respectively arranged above and below the adjustment holes 743 are arranged in the adjustment shell bodies 744, and adjustment seats 746 that can slide relative to the adjustment bars 745 are clamped between the adjustment bars 745, and adjustment grooves 747 cooperating with the adjustment bars 745 are opened above and below the adjustment seats 746, and pulley mounting holes 748 that are opposite to the adjustment holes 743 and the conveyor belt assembly 76 are opened on the adjustment seats 746, and an adjustment bolt 749 threadedly connected to the adjustment shell body 744 is installed on one side of the adjustment seats 746. The utility model comprises a mounting platform 751 fixed on the upper part of the upper shell 74, a plurality of studs for adjusting the relative height of the mounting platform 751 and the upper shell 74 are arranged between the mounting platform 751 and the upper shell 74, a driving motor 752 is fixed on the upper part of the mounting platform 751, and the output end of the driving motor 752 drives the conveyor belt assembly 76 to move through a sprocket transmission mechanism 753, a sprocket cover plate 754 is arranged on the outer side of the sprocket transmission mechanism 753, a plurality of support seats 725 are arranged on the lower part of the outer side of the lower shell 72, and a support foot 726 and / or a universal wheel 727 are arranged under the support seat 725, and the conveyor belt assembly 76 comprises a conveyor belt wheel 761 rotatably installed in the chip removal chamber 741 and the chip collection chamber 721, a conveyor belt 762 is arranged between the conveyor belt wheels 761, and the conveyor belt 762 is arranged at the bottom of the chip collection chamber 721 and the chip removal channel 731. The adjustment seat 746 can move laterally along the upper shell 74, and the pulley mounting hole 748 therebetween is used to fix the conveyor pulley 761 of the conveyor belt assembly 76. The mounting platform 751 above the driving mechanism 75 can be vertically raised and lowered to tighten the transmission chain in the sprocket transmission mechanism 753, thereby maintaining a smooth output of power to the conveyor belt assembly 76.

[0043] Obviously, the servo tool rest 5 includes a tool rest column 511 arranged on the lathe body 1, a rotary tool turret 52 is fixed on the side of the tool rest column 511 opposite to the spindle, a tool rest motor 521 of the rotary tool turret 52 is plugged and fixed in the tool rest column 511, the rotary tool turret 52 adopts a rear tool turret 522, a tool rest seat 523 is arranged between the rear tool turret 522 and the tool rest motor 521, a locking mechanism 53 is arranged between the tool rest seat 523 and the rear tool turret 522, and the center plane of the rear tool turret 522 is relative to the center plane of the rear tool turret 522. Perpendicular to the horizontal plane, a fixing mechanism 54 is arranged between the tool rest seat 523 and the top of the lathe body 1, a numerical control module connected to the tool rest motor 521 and the locking mechanism 53 is arranged in the rotary tool turret 52, the rear tool turret 522 has a plurality of tool clamping stations 524 symmetrical relative to its center, a first hydraulic clamping mechanism 55, a second hydraulic clamping mechanism 56 or a third hydraulic clamping mechanism 57 is fixed on the tool clamping station 524, and a hydraulic drive module 58 connected to the numerical control module is arranged in the rotary tool turret 52. The rear tool turret 522 in the servo tool rest 5 is arranged vertically and opposite to the lower end of the cutting spindle 4. As the tool rest motor 521 drives the rear tool turret 522 to rotate, the tool clamped by the tool clamping station 524 is switched, and the locking mechanism 53 realizes the locking and fixing of the tool position to prevent loosening during turning.

[0044] Preferably, the first hydraulic clamping mechanism 55 includes a first clamping groove 551 which is arranged on the end surface of the rear turret 522 and extends in the radial direction, and a first clamping block 552 connected to the hydraulic drive module 58 is arranged inside the first clamping groove 551. The second hydraulic clamping mechanism 56 includes a hydraulic seat 561 fixed to the side of the rear turret 522, and a second clamping groove 562 extending along the axial direction of the rear turret 522 is opened on the outer side of the hydraulic seat 561. A second clamping block 563 connected to the hydraulic drive module 58 is arranged inside the second clamping groove 562. The third hydraulic clamping mechanism 57 includes a hydraulic platform 571 fixed to the side of the rear turret 522, and a second clamping block 563 connected to the hydraulic drive module 58 is arranged inside the hydraulic platform 571. A clamping hole 572 is opened in the center and extends axially along the rear turret 522. A clamping bolt 573 with an end facing the inner side of the clamping hole 572 is threadedly connected to one side of the hydraulic table 571. The locking mechanism 53 is a triple toothed disc 531 arranged between the tool holder seat body 523 and the rear turret 522. The triple toothed disc 531 is connected to the hydraulic drive module 58. The hydraulic drive module 58 is a hydraulic drive cylinder and a hydraulic distribution oil circuit connected to the hydraulic drive cylinder. The fixing mechanism 54 includes fixing strips 541 arranged on both sides below the tool holder seat body 523. A plurality of fixing notches 542 are opened on the fixing strips 541. The rear turret 522 is opposite to the chip removal port 512 below the lathe body 1. When the tool is clamped in the first hydraulic clamping mechanism 55, the tool head extends radially along the rear turret 522, and when it is vertically upward, it starts to process the workpiece relative to the main shaft. The tool clamped by the second hydraulic clamping mechanism 56 extends axially along the rear turret 522 and is horizontally arranged. It rotates to the top of the rear turret 522 to mill the workpiece. The tool is inserted into the clamping hole 572 and is kept relatively fixed with the hydraulic table 571 under the clamping force of the clamping bolt 573. At the same time, the tool head extends axially along the rear turret 522, and the triple gear disc 531 is loosened or locked under the action of hydraulic pressure.

[0045] To sum up, the principle of this embodiment is that the cutting spindle 4 is inverted and slides relative to the lathe body 1 through the movable guide rail assembly 3, and the bar material transported from the loading rack 2 is clamped and transferred to the top of the servo tool holder 5 for turning. After one end of the workpiece is processed, it is transferred and reversed by the bar reversing mechanism 6, so that the other cutting spindle 4 can clamp and fix the other end of the bar material and turn it. After the processing is completed, the finished product is transferred to the belt conveyor 8 for output, thereby realizing two-way continuous processing and turning of the workpiece.

[0046] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0047] Although this article uses more lathe body 1, loading rack 2, moving guide rail assembly 3, sliding seat body 32, lateral moving mechanism 33, lateral slide rail 331, lateral slider 332, lateral limit groove 333, lateral limit protrusion 334, pad 335, lateral drive mechanism 336, vertical moving mechanism 34, vertical slide rail 341, vertical slider 342, vertical limit groove 343, vertical limit protrusion 344, slide rail pressing block 345, flange bracket 346, sliding table body 35, side cover plate 351, positive baffle plate 352, upper baffle plate 353, chip cover 354, top cover plate 355, oil pipe bracket 356, guide hole 357, grease distributor 358, electric spindle assembly 36, spindle box 361, electric spindle body 362, cooling jacket 3 63. Cooling groove 364. Spindle cover 365. Clamping ring 366. Adjusting bolt 367. Sealing groove 368. Sealing ring 369. Rotary hydraulic cylinder 37. Pull rod 371. Pull hole 372. Sealing cylinder 373. Spacer ring 374. Hydraulic chuck 38. Chuck body 381. Clamping jaw block 382. Clamping jaw foot 383. Fixing groove 384. Fixing bar 385. Vertical drive mechanism 39. Servo motor 391. Coupling 392. Drive screw 393. Screw seat body 394. Screw nut 395. Cutting spindle 4. Servo tool rest 5. Tool rest column 511. Chip removal port 512. Rotary turret 52. Tool rest motor 521. Rear turret 522. Tool rest seat body 523. Tool clamping station 524. Locking mechanism 53. Triple gear disc 5 31. fixing mechanism 54. fixing bar 541. fixing notch 542. first hydraulic clamping mechanism 55. first clamping groove 551. first clamping block 552. second hydraulic clamping mechanism 56. hydraulic seat 561. second clamping groove 562. second clamping block 563. third hydraulic clamping mechanism 57. hydraulic platform 571. clamping hole 572. clamping bolt 573. hydraulic drive module 58. bar reversing mechanism 6. mounting column 611. slewing hole 612. vertical spindle 613. slewing arm assembly 62. slewing shaft 621. slewing motor 622. rotating plate 623. chuck assembly 63. chuck seat body 631. claw 632. telescopic mechanism 64. telescopic cylinder 641. telescopic rod 642. telescopic platform 643. telescopic limit mechanism 6 5. Limiting column 651, limiting protrusion 652, limiting hole 653, chip removal device 7, lower shell 72, chip collection chamber 721, chip feed port 722, chip guide plate 723, support bar 724, support seat 725, support foot 726, universal wheel 727, inclined shell 73, chip removal channel 731, upper shell 74, chip removal chamber 741, chip removal port 742, adjustment hole 743, adjustment shell 744, adjustment bar 745, adjustment seat 746, adjustment groove 747, pulley mounting hole 748, adjustment bolt 749, drive mechanism 75, mounting platform 751, drive motor 752, sprocket transmission mechanism 753, sprocket cover plate 754, conveyor belt assembly 76, conveyor belt wheel 761, conveyor belt 762, negative pressure chamber 77, negative pressure port 771,The terms centrifugal pump 78, socket 79, filter baffle 791, belt conveyor 8, etc. are used, but the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A dual-spindle inverted CNC lathe, comprising a lathe body (1), wherein a loading rack (2) is arranged on one side of the lathe body (1) and a belt conveyor (8) is arranged on the other side, characterized in that: Two inverted cutting spindles (4) are installed above the lathe body (1) via a movable guide rail assembly (3), servo tool holders (5) opposite to the cutting spindles (4) are respectively arranged below the cutting spindles (4), and a bar material reversing mechanism (6) for transferring and processing bar materials is arranged between the cutting spindles (4); the bar material reversing mechanism (6) comprises two symmetrically arranged swivel arm assemblies (62), the swivel arm assembly (62) having a swivel shaft (621) arranged above the lathe body (1) and extending longitudinally along the lathe body (1), the swivel shafts (621) being parallel to each other and rotatably connected to the lathe body (1). A vertically arranged mounting column (611) is installed above the lathe body (1), and a rotating hole (612) is opened on the mounting column (611) for a rotating shaft (621) to pass through. The end of the rotating shaft (621) is connected to the output end of a rotating motor (622) installed on the back of the lathe body (1), and a rotating plate (623) perpendicular to the rotating shaft (621) is fixed to the other end of the rotating shaft (621), and a chuck assembly (63) is installed on the opposite side of the rotating plate (623), and a telescopic mechanism (64) is provided between the chuck assembly (63) and the rotating plate (623);A chip removal device (7) is arranged below the lathe body, and the chip removal device (7) comprises a lower shell (72) arranged below the lathe body (1); the lower shell (72) is in an elongated shape and has a chip collection chamber (721) inside; a chip feed opening (722) is opened above the lower shell (72); one end of the lower shell (72) is connected to an inclined shell (73) arranged obliquely; an upper shell (74) is connected above the inclined shell (73); the upper shell (74) has a chip removal chamber (741) inside, and A chip discharge port (742) communicating with the chip discharge chamber (741) is provided at the bottom of the upper shell (74); a chip discharge channel (731) communicating with the chip collection chamber (721) and the chip discharge chamber (741) is provided inside the inclined shell (73); a driving mechanism (75) is installed above the upper shell (74); the driving mechanism (75) is connected to a conveyor belt assembly (76); and the conveyor belt assembly (76) is arranged between the chip discharge chamber (741), the chip discharge channel (731) and the chip collection chamber (721); The chip inlet (722) of the lower shell (72) is opposite to the chip collection port at the lower front of the lathe body (1); the lower shell (72) extends from the lower front of the lathe body (1) to the rear of the lathe body (1); the inclined shell (73) and the upper shell (74) are arranged on the back of the lathe body (1); a negative pressure chamber (77) is arranged inside the lower shell (72); negative pressure ports (771) communicating with the negative pressure chamber (77) are opened on both sides of the chip collection chamber (721); the lower shell (72) and the inclined shell (73) are arranged on the back of the lathe body (1); A centrifugal pump (78) is installed above one end opposite to the lower housing (73), and the centrifugal pump (78) is connected to the negative pressure chamber (77); a socket (79) opposite to the negative pressure chamber (77) is arranged above the junction of the lower housing (72) and the inclined housing (73); a filter baffle (791) is inserted into the socket (79); an inclined chip guide plate (723) is arranged at the chip inlet (722) above the chip collection chamber (721); and the negative pressure ports (771) are arranged in a strip shape below the chip guide plate (723);A plurality of support bars (724) are arranged below the chip collection chamber (721); the support bars (724) are C-shaped and have two ends respectively fixed to the side surfaces of the lower shell (72); adjustment holes (743) extending in a transverse direction are respectively opened on both sides of the upper shell (74); the outer side of the adjustment hole (743) is covered with an adjustment shell (744); the adjustment shell (744) is provided with adjustment bars (745) extending in a transverse direction and respectively arranged above and below the adjustment hole (743); An adjustment seat (746) is clamped between the section bars (745) and can slide relative to the adjustment bar (745). The adjustment seat (746) has an adjustment groove (747) on the upper and lower sides thereof that cooperates with the adjustment bar (745). The adjustment seat (746) has a pulley mounting hole (748) that is opposite to the adjustment hole (743) and opposite to the conveyor belt assembly (76). An adjustment bolt (749) threadedly connected to the adjustment housing (744) is installed on one side of the adjustment seat (746). The driving mechanism (75) includes The invention comprises a mounting platform (751) fixed on the upper part of the upper shell (74); a plurality of studs for adjusting the relative height between the mounting platform (751) and the upper shell (74) are arranged between the mounting platform (751) and the upper shell (74); a driving motor (752) is fixed on the upper part of the mounting platform (751); an output end of the driving motor (752) drives the conveyor belt assembly (76) to move through a sprocket transmission mechanism (753); a sprocket cover plate (754) is arranged on the outer side of the sprocket transmission mechanism (753); A plurality of support seats (725) are arranged below the outer side of the lower shell (72), support feet (726) and / or universal wheels (727) are installed below the support seats (725), the conveyor belt assembly (76) comprises a conveyor belt wheel (761) rotatably installed in the chip removal chamber (741) and the chip collection chamber (721), a conveyor belt (762) is arranged between the conveyor belt wheels (761), and the conveyor belt (762) is arranged in close contact with the bottom of the chip collection chamber (721) and the chip removal channel (731). ; 2. The dual-spindle inverted CNC lathe according to claim 1, characterized in that: A vertically arranged mounting column (611) is installed above the lathe body (1), and a rotating hole (612) is formed on the mounting column (611) for the rotating shaft (621) to pass through. The chuck assembly (63) comprises a cylindrical chuck seat (631), and a plurality of hydraulically driven clamping claws (632) are arranged at the end of the chuck seat (631) symmetrically relative to the center thereof. The telescopic mechanism (64) comprises a telescopic cylinder (641) fixed to one side of the rotating plate (623). A telescopic platform (643) connected to the chuck assembly (63) is fixed at the end of the telescopic rod (642) of the telescopic cylinder (641); a telescopic limiting mechanism (65) is arranged between the telescopic platform (643) and the telescopic cylinder (641); the telescopic limiting mechanism (65) comprises a limiting column (651) parallel to the telescopic rod (642); a limiting protrusion (652) symmetrical with respect to the center of the telescopic platform (643) is arranged on the side surface of the telescopic platform (643); the limiting column (651) and the limiting protrusion (652) are symmetrical with respect to the center of the telescopic platform (643); 652) are fixedly connected, a limiting hole (653) for inserting a limiting column (651) is opened at one end of the telescopic cylinder (641) opposite to the telescopic table (643), the limiting column (651) is axially telescopic relative to the limiting hole (653), the chuck assemblies (63) between the rotating arm assemblies (62) are arranged opposite to each other and the central axes are coincident, two vertical spindles (613) are installed above the lathe body (1), and the rotating arm assembly (62) is arranged between the vertical spindles (613) The rotating plate (623) is provided with through holes for installing the telescopic mechanism (64) and the chuck assembly (63); the central axes of the through holes on the rotating plate (623) arranged vertically symmetrically coincide with each other; the chuck assemblies (63) between the rotating arm assemblies (62) are arranged relatively to each other and their central axes coincide with each other; when the chuck assemblies (63) of the rotating arm assemblies (62) are relatively to each other, a spacing for clamping the bar is reserved therebetween; the rotating motor (622), the chuck assembly (63) and the telescopic mechanism (64) are connected to the numerical control module.

3. The dual-spindle inverted CNC lathe according to claim 1, characterized in that: The movable guide rail assembly (3) comprises a sliding seat body (32) mounted on a lathe body (1); a lateral movement mechanism (33) is arranged between the sliding seat body (32) and the lathe body (1) for driving the sliding seat body (32) to move horizontally relative to the lathe body (1); and a sliding platform body (35) is installed on the sliding seat body (32) via a vertical movement mechanism (34) and can be raised and lowered relative to the sliding seat body (32).

4. The dual-spindle inverted CNC lathe according to claim 3, characterized in that: The lateral movement mechanism (33) comprises two parallel lateral slide rails (331) extending in the lateral direction of the lathe body (1); a plurality of lateral slide blocks (332) engaging with the lateral slide rails (331) are fixed on the side of the sliding seat (32) opposite to the lateral slide rails (331); lateral limit grooves (333) are respectively formed on the upper and lower parts of the lateral slide rails (331); a lateral limit protrusion (334) engaging with the lateral limit grooves (333) is formed on the lateral slide block (332); A pad (335) is provided between the sliding block (332) and the sliding seat body (32); a lateral drive mechanism (336) is installed at one end of the lathe body (1); the lateral drive mechanism (336) adopts a gear rack transmission, a screw transmission or a hydraulic / pneumatic transmission; the vertical movement mechanism (34) comprises two parallel vertical slide rails (341) extending in the vertical direction of the sliding platform body (35); a plurality of vertical slide rails (341) are fixed on one side of the sliding seat body (32) opposite to the vertical slide rails (341); A vertical slide block (342) is engaged with the vertical slide rail (341), vertical limit grooves (343) are respectively provided on both sides of the vertical slide rail (341), a vertical limit protrusion (344) engaged with the vertical limit groove (343) is provided on the vertical slide rail (342), a plurality of slide rail pressing blocks (345) are arranged between the vertical slide rail (341) and the sliding platform (35), a flange bracket (346) is installed above the sliding seat (32), and the flange bracket (346) and the sliding platform (35) are connected to each other. A vertical drive mechanism (39) is installed between the two flange brackets (346), the vertical drive mechanism (39) comprising a servo motor (391) installed above the flange bracket (346), the output end of the servo motor (391) facing downward and connected to a driving screw (393) via a coupling (392), a screw seat body (394) is installed on the sliding platform body (35), a screw nut (395) is installed at the center of the screw seat body (394), and the screw nut (395) is connected to the driving screw (393).

5. The dual-spindle inverted CNC lathe according to claim 4, characterized in that: A side cover plate (351) is installed at the lower end of the sliding table body (35), and the side cover plate (351) is arranged between the electric spindle assembly and the hydraulic chuck (38). A positive baffle plate (352) is fixed on the side opposite to the sliding table body (35) below the side cover plate (351), and an upper baffle plate (353) is fixed on the other side. A chip guard (354) opposite to the side of the hydraulic chuck (38) is fixed below the side cover plate (351), and a top cover plate (355) for enclosing the side of the cutting spindle (4) is fixed above the side cover plate (351). An oil pipe bracket (356) is fixed on the sliding table body (35), and an opening is provided on the oil pipe bracket (356). There are a plurality of guide holes through which oil supply pipes pass, grease distributors (358) are respectively installed on both sides of the sliding seat body (32), the cutting spindle (4) includes a spindle box (361) installed on the sliding table body (35), the center of the spindle box (361) is installed with an electric spindle body (362) in the vertical direction, a rotary hydraulic cylinder (37) is fixed above the electric spindle body (362), the rotary hydraulic cylinder (37) is connected to a hydraulic chuck (38) installed at the lower end of the electric spindle body (362) through a pull rod (371), the outer side of the electric spindle body (362) is covered with a cooling jacket (363), and the outer side of the cooling jacket (363) is provided with a ring-shaped A cooling groove (364) is arranged in a coiled shape, a clamping ring (366) is sleeved between the outer side of the upper side of the cooling sleeve (363) and the outer side of the spindle cover (365) above the spindle box (361), a notch is provided on the clamping ring (366) and an adjusting bolt (367) for adjusting the looseness of the clamping ring (366) is provided between the outer side of the cooling sleeve (363) and the inner side of the spindle box (361), a sealing groove (368) is provided on the inner side of the sealing groove (368) and is fitted and pressed against the spindle box (361), a pulling hole (372) for the pulling rod (371) to pass through is provided in the center of the electric spindle body (362), and the electric spindle body The outer side of the lower end of (362) is provided with a sealing cylinder (373) which is pressed and fixed with the lower end of the cooling sleeve (363) and a spacer ring (374) which is sleeved on the outer side of the sealing cylinder (373). The hydraulic chuck (38) includes a chuck body (381) and a clamping jaw block (382) which is symmetrically arranged relative to the center of the chuck body (381). The chuck body (381) is connected to the clamping jaw block (382) through a clamping jaw foot (383) and a gap is left between the chuck body (381) and the clamping jaw block (382). The clamping jaw foot (383) and the clamping jaw block (382) are provided with a fixing groove (384) and a fixing strip (385) which are inserted into each other and cross-arranged on the opposite side.

6. The dual-spindle inverted CNC lathe according to claim 1, characterized in that: The servo tool rest (5) comprises a tool rest column (511) arranged on a lathe body (1); a rotary tool turret (52) is fixed on a side of the tool rest column (511) opposite to the main shaft; a tool rest motor (521) of the rotary tool turret (52) is plugged and fixed in the tool rest column (511); the rotary tool turret (52) adopts a rear-mounted tool turret (522); a tool rest seat (523) is arranged between the rear-mounted tool turret (522) and the tool rest motor (521); a locking mechanism (53) is arranged between the tool rest seat (523) and the rear-mounted tool turret (522); The center plane is perpendicular to the horizontal plane, a fixing mechanism (54) is arranged between the tool holder seat (523) and the top of the lathe body (1), a numerical control module connected to the tool holder motor (521) and the locking mechanism (53) is arranged in the rotary tool turret (52), the rear tool turret (522) has a plurality of tool clamping stations (524) symmetrical with respect to its center, a first hydraulic clamping mechanism (55), a second hydraulic clamping mechanism (56) or a third hydraulic clamping mechanism (57) is fixed on the tool clamping station (524), and a hydraulic drive module (58) connected to the numerical control module is arranged in the rotary tool turret (52).

7. The dual-spindle inverted CNC lathe according to claim 6, characterized in that: The first hydraulic clamping mechanism (55) comprises a first clamping groove (551) arranged on the end surface of the rear turret (522) and extending in the radial direction, and a first clamping block (552) connected to the hydraulic drive module (58) is arranged inside the first clamping groove (551). The second hydraulic clamping mechanism (56) comprises a hydraulic seat (561) fixed on the side of the rear turret (522), and a second clamping groove (562) extending axially along the rear turret (522) is opened on the outer side of the hydraulic seat (561), and a second clamping block (563) connected to the hydraulic drive module (58) is arranged inside the second clamping groove (562). The third hydraulic clamping mechanism (57) comprises a hydraulic platform (571) fixed on the side of the rear turret (522), and a hydraulic platform (571) is opened at the center. A clamping hole (572) extends axially along the rear turret (522); a clamping bolt (573) is threadedly connected to one side of the hydraulic platform (571) and has an end facing the inner side of the clamping hole (572); the locking mechanism (53) is a triple toothed disc (531) arranged between the tool holder seat (523) and the rear turret (522); the triple toothed disc (531) is connected to a hydraulic drive module (58); the hydraulic drive module (58) is a hydraulic drive cylinder and a hydraulic distribution oil circuit connected to the hydraulic drive cylinder; the fixing mechanism (54) includes fixing strips (541) arranged on both sides below the tool holder seat (523); a plurality of fixing notches (542) are formed on the fixing strips (541); and the rear turret (522) faces a chip removal port (512) below the lathe body (1).

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